OAIster, in addition to having passed the 10 million record landmark, has a new look and feel as well! For example, the OAIster web page now describers OAIster as a union catalog of digital resources. I like this - it seems easier to relate to this description than OAI-PMH metadata harvesting search tool. This could be because I'm a librarian, though!
If you know the name of a particular repository, you can do an OAIster search and enter the repository name as a search term, for an alternative way to search the other repository. For example, a search for "information literacy" and "E-LIS" yields all the documents in E-LIS on information literacy.
How do the results of an OAIster search of another repository compare with a direct search of another repository? Could this be an interesting question for a reference class?
This post reflects my personal opinion only and does not represent the opinions or policy of the BC Electronic Library Network or the Simon Fraser University Library.